It could be any one of a number of reaqsons. For example, the computer's hardware might not meet the minimum requirements of the software.
No, it will only run with the game installed PLUS the disk in.
If you already bought it... put it in and then click install. Its should work from there
You need to have Sims3 installed on your computer in order the be able to use ANY expansion packs.
No you don't need internet for playing sims3 late night,unless you want to log in to sims store and buy new stuff.
Yes, you need to have the base game (Sims 3) installed if you want to add an expansion pack, without it they won't work.
Your computer may struggle to deal with the Sims3. I had a similar problem with my Mac
you cant, you need the sims3 game to be able to install expansion packs x
yes you can
You buy the game, install it and then you play it.
You need to have a capture card installed in your computer or have recording software such as Fraps.
yes
yes it will